Erasive tablet.



J S. RAPS EEASIVE TA T.

APPLICATION FILED D110. 14, 1908.

923,576. Patented June 1, 1909.

Fig.1

A jv g UNIT rams PATENT FFM).

I JOHN S. RAPSON, OF JENKINTOWN, PENNSYLVANIA.

ERASIVE TABLET,

Specification of Letters Patent.

Application filed December 14, 1908.

Patented June 1, 1909.

Serial No. 467,507.

of Jenkintown, county of Montgomery,

State of Pennsylvania, have invented an Improvement in Erasive Tablets, of which the following is a specification.

My invention has reference to erasive tablets and consists of certain improvements which are fully set forth in the following specification, and shown in the accompanying drawings which form a part thereof.

Heret-ofore it has been customary to form erasers hard for pencil or ink in solid tablets and in some cases where the eraser is to be more yielding as for purposes of cleaning drawings where great abrasive action is not required, ,the end of the rubber tablet has been sub-divided in the direction of the length of the tablet so as to present a large number of independent filaments which are perfectly flexible when the rubber is used upon the paper.

The object of my invention is to provide an erosive tablet hard for pencil or ink in wl'iich there is provided a series of detachable portions, said portions being connected at their ends into an integral structure with the body of the tablet. When the outermost portion is soiled or materially reduced in effectiveness by wear and contact with objectionable matter, it may be detached and thereby leave a new and fresh portion of the eraser properly shaped for immediate use and in a perfectly clean and unused condition.

My invention consists of an erasive tablet formed of elastic erasive material and having a portion thereof provided with transverse incisions either wholly or part way through the body to form 'bars or layers which are connected at their ends with the body so as to maintain a definite position in use and to prevent the separation of the said layers except when intentionally done for the purpose of bringing the new layer into operative position upon the tablet.

My invention also comprehends details of construction which together with the features abovespecified, will be better understood by ieference to the drawings in which-- t Figure 1 is a plan view of an eraser tablet embodying my invention; Fig. 2 is a sectional elevation of the same on line. 2-2; Fig. 3 is a view similar to Fig. 1 showing the slits or incisions in curved iorm, and Fig. i is a sectional elevation corresponding to Fig. 2 showing the modification of my invention.

A is the body of the tablet and may be all of soft rubber such as required for the erasure of pencil marks or may be partly made of abrading rubber compound such as commonly known as ink erasers and which is indicated at Fin Fig. 1. end of the erasive tablet A V shaped, as indicated at B, and parallel to the outer V shaped walls I provide a series of parallel incisions or slits C which form a corresponding series of bars S of erasive material, said bars being united at their ends by continuous portions D and E and integral with the ends of said bars and with the body of the tablet A, as will be clearly understood by reference to Fig. 1. As shown, there are two sets of the incisions, the incisions of one set being arranged obliquely to the incisions of the other set so that as the outermost bars are used and removed thesuccessive bars will occupy substantially the same position with reference to the body of the eraser, that was occupied by the outermost bars. In m'dinary use the outermost bar on one side and the outermost bar on the other side would be indiscriminately used so that they might both be removed at or about the same time to bring fresh bars into operative position. The removal of the outermostbars may be accomplished either by simplytearing them off or more preferablyby severing the connect ing parts D and E in line with the incisions by use of a knife, as will be readily understood. lhe incisions C may extend entirely through the body of the tablet A as indicated in Fig. 2, or if desired these incisions may extend only part way through from either or both sides so as to form a very thin connecting layer G, which will unite with the parts D and E, said construction being indicated in Fig. 4. In this manner somewhat more stability will be given to the bars S during their use in erasing and because of which it would be possible to make the bars S longer than would otherwise be the case.

In Fig. 3 I have shown the end of the erasive tablet as having curved edges and curved slits or incisions, but otherwise this structure is the same asin Fig. 1; It is evident that these incisions and connecting bars S so formed may be employed at an place upon the erasive tablet if'so desire I prefer to form the r a plurality but I have shown them arranged at one end thereof V shaped and provided with two only as an example of a practical and satisseries of erasing bars arranged at an angle to factory arrangement of said bars upon the each other and united by a transverse bar tablet; I however do not restrict or confine forming a partof the body of the tablet.

myself in any manner as to the position or 5. An erasive tablet consisting of a fiat 'arran ement of said bars except that they tablet of erasive material having one end shall e connected at their ends parallel or 1 thereof V-shaped and provided with two concentric according to the shape of the inseries of erasing barsarranged at an angle to cisions. While I prefer the construction each other and united by a transverse bar shown, the tablet may be modified without I forming a part of the body of the tablet and de arting from the spirit of the invention. in which the other or distant ends of the two aving now described my invention what T series of bars are respectively connected inte- I claim as new and desire to secure by Leti grally with other bars forming a part of the ters Patent, is: body of the tablet, whereby the bars of the 1. An erasive tablet consisting of a flat two series are held to the body ateach end. body of erasive material having a plurality 5 6. An erasive tablet having a plurality of of incisions terminating at each end within superimposed bars connected at their ends the erasive material and forming a plurality with the body of the tablet whereby they are of parallel bars integrally connected together held against displacement during use but at their ends and to the body of the tablet. 5 may be easily detached to expose a fresh 2. An erasive tablet consisting of a flatcrasing surfaceI t v body of erasive material having a plurality 7. An erasive tablet having its edge proof incisions terminating at each end within the erasive material and forming a plurality of parallel bars integrally connected together I 8. at their ends and to the body of the tablet by erasing bars arranged side by side and inteof connectin bars arranged grally connected at a pluralit of distantly transversely to the parallel are. r located places, whereby the ars are norwith the body of the tablet.

An eraser consisting of a pluralit of vided with an erasing bar integral at its ends 3. An erasive tablet consisting of a flat mally supported and held in proper relative I body of erasive material havinga plurality of 1 positions and the outer bar may be easily incisions extending entirely through the detached to expose a fresh erasing surface. body and terminating at each end within the In testimony of which invention, I hereerasive material and forming a plurality of J unto set my hand.

parallel bars of the thickness of the body integrally connected together at their ends and to the body of the tablet.

. 4. An erasive tablet consisting. of a fiat tablet of erasive material having one end JOHN s. RAPSON.

Witnesses:

R. M. HUNTER, AUGUST RETTIG. 

